Lithium battery charging method, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a lithium battery charging method, electronic equipment and a storage medium. The lithium battery charging method comprises the following steps: acquiring a constant-voltage charging current curve of a lithium battery in a constant-voltage charging process; determining a charging rate combination corresponding to the constant-voltage charging current curve; fitting the constant-voltage charging current curve and the charging multiplying power combination to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve; and constructing a charging strategy corresponding to the lithium battery according to the equivalent step current curve and the charging rate combination, and charging the lithium battery based on the charging strategy.

Description

Technical Field

[0001] The present application relates to the technical field of battery charging, and in particular to a lithium battery charging method, an electronic device and a storage medium. Background Art

[0002] Charging strategy is a key factor affecting the performance of fast-charged batteries. The current charging system used in the application and testing of lithium-ion batteries is mainly the constant current constant voltage (CC-CV) charging method. Although this charging method is simple and easy to operate, the charging temperature rise of this method is large as the fast-charge power increases.

[0003] At present, the large charging temperature rise not only affects the user experience, but also affects the battery life. The main heat dissipation measure of the current constant current and constant voltage charging method is to attach graphene heat sinks and VC heat dissipation plates for passive heat dissipation treatment. However, as time accumulates, the temperature of the lithium battery during charging will become higher and higher. The above-mentioned passive heat dissipation treatment method cannot effectively reduce the charging temperature, which will lead to charging safety accidents. That is, the current lithium battery charging method is not safe. Summary of the invention

[0004] The embodiments of the present application provide a lithium battery charging method, an electronic device, and a storage medium, which can improve the safety of lithium battery charging.

[0005] The present application embodiment provides a lithium battery charging method, comprising:

[0006] Obtain the constant voltage charging current curve of the lithium battery during constant voltage charging;

[0007] Determine a charging rate combination corresponding to the constant voltage charging current curve;

[0008] Fitting the constant voltage charging current curve with the charging rate combination to obtain an equivalent step current curve corresponding to the constant voltage charging current curve;

[0009] According to the equivalent step current curve and the charging rate combination, a charging strategy corresponding to the lithium battery is constructed, and the lithium battery is charged based on the charging strategy.

[0010] Optionally, in some embodiments of the present application, constructing a charging strategy corresponding to the lithium battery according to the equivalent step current curve and the charging rate combination, and charging the lithium battery based on the charging strategy includes:

[0011] Determining the charging rate corresponding to the equivalent step current curve and the working time corresponding to each charging rate in the charging rate combination, and determining the constant current rate corresponding to the constant voltage charging current curve;

[0012] Constructing a charging strategy corresponding to the lithium battery according to the charging rate, the working time corresponding to each charging rate, and the constant current rate;

[0013] The lithium battery is charged based on the real-time charging demand and the charging strategy.

[0014] Optionally, in some embodiments of the present application, constructing a charging strategy corresponding to the lithium battery according to the charging rate, the working time corresponding to each charging rate, and the constant current rate includes:

[0015] Obtain the temperature rise curve of the lithium battery during constant voltage charging;

[0016] Determine the temperature rise inflection point corresponding to the temperature rise curve;

[0017] Based on the temperature rise inflection point, the charging rate, the working time corresponding to each charging rate, and the constant current rate, a charging strategy corresponding to the lithium battery is constructed.

[0018] Optionally, in some embodiments of the present application, the charging strategy corresponding to the lithium battery is constructed based on the temperature rise inflection point, the charging rate, the working time corresponding to each charging rate, and the constant current rate, including:

[0019] Determine the charging rate corresponding to the temperature rise inflection point as the temperature rise inflection point rate;

[0020] reducing the operating time of the charging rate greater than the temperature rise inflection point rate to a preset value, and;

[0021] Adjusting the working time of the charging rate less than the temperature rise inflection point rate according to a preset strategy;

[0022] A charging strategy corresponding to the lithium battery is constructed according to the adjusted working time, the temperature rise inflection point, the charging rate and the constant current rate.

[0023] Optionally, in some embodiments of the present application, charging the lithium battery based on the real-time charging demand and the charging strategy includes:

[0024] When the lithium battery is charged using the charging strategy, the charging time is reduced or the charging rate is reduced based on real-time charging requirements.

[0025] Optionally, in some embodiments of the present application, determining the charging rate combination corresponding to the constant voltage charging current curve includes:

[0026] Determining the charging current value corresponding to each time point in the constant voltage charging current curve;

[0027] Determine a data point in the constant voltage charging current curve that meets a preset condition;

[0028] Based on the charging current value corresponding to each time point and the data point, a charging rate combination corresponding to the constant voltage charging current curve is determined.

[0029] Optionally, in some embodiments of the present application, the fitting of the constant-voltage charging current curve and the charging rate combination to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve includes:

[0030] Determine the time period in which the current of each charging rate in the charging rate combination remains relatively stable, and obtain the working time corresponding to the charging rate;

[0031] The constant-voltage charging current curve and the charging rate combination are fitted according to the constant-voltage charging current curve and the working time corresponding to the charging rate to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve.

[0032] Correspondingly, the present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the steps of any of the above methods when executing the program.

[0033] The present application also provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above methods are implemented.

[0034] The embodiment of the present application provides a lithium battery charging method, electronic device and storage medium. After obtaining the constant voltage charging current curve of the lithium battery during constant voltage charging, the charging rate combination corresponding to the constant voltage charging current curve is determined. Then, the constant voltage charging current curve and the charging rate combination are fitted to obtain the equivalent step current curve corresponding to the constant voltage charging current curve. Finally, according to the equivalent step current curve and the charging rate combination, a charging strategy corresponding to the lithium battery is constructed, and the lithium battery is charged based on the charging strategy. The lithium battery charging scheme provided by the present application combines the constant voltage charging current curve and the charging rate of the lithium battery during constant voltage charging to form an equivalent step current curve, and uses the equivalent step current curve and the charging rate combination to construct a charging strategy corresponding to the lithium battery. In this way, charging is performed. During the charging process, the temperature rise caused by the constant current and constant voltage charging method can be avoided, thereby improving the safety of lithium battery charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a flow chart of a lithium battery charging method provided in an embodiment of the present application;

[0037] Figure 2 is an equivalent step current curve diagram of the lithium battery charging method provided in the embodiment of the present application;

[0038] Figure 3 is a current curve corresponding to the charging strategy in the lithium battery charging method provided in the embodiment of the present application;

[0039] Figure 4 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0041] Embodiments of the present application provide a lithium battery charging method, an electronic device, and a storage medium.

[0042] Among them, the lithium battery charging method can be specifically applied in a terminal, which can include a tablet computer or a personal computer (PC). The terminal can establish a wired or wireless connection with a server. The server can include an independently running server or a distributed server, or a server cluster composed of multiple servers.

[0043] It should be noted that the order of description of the following embodiments is not intended to limit the priority order of the embodiments.

[0044] A lithium battery charging method comprises: obtaining a constant voltage charging current curve of a lithium battery during constant voltage charging; determining a charging rate combination corresponding to the constant voltage charging current curve; fitting the constant voltage charging current curve and the charging rate combination to obtain an equivalent step current curve corresponding to the constant voltage charging current curve; constructing a charging strategy corresponding to the lithium battery according to the equivalent step current curve and the charging rate combination, and charging the lithium battery based on the charging strategy.

[0045] See also Figure 1 , Figure 1 This is a schematic diagram of the process of the lithium battery charging method provided in the embodiment of the present application. The specific process of the lithium battery charging method can be as follows:

[0046] 101. Obtain a constant voltage charging current curve of a lithium battery during constant voltage charging.

[0047] First, select a lithium battery that is completely discharged or at a certain level (such as fully discharged to its lowest voltage cutoff point, or the battery is discharged to 30% or 50% of its nominal capacity). Then, set the constant voltage charging voltage value on the charger or electronic load, usually the nominal voltage of the battery or a value slightly higher than the nominal voltage. Next, ensure that the data acquisition equipment has been calibrated and set up to record the current and voltage data during the charging process. Then, start constant voltage charging of the lithium battery and record the moment when the battery voltage reaches the set constant voltage charging voltage. At this time, it enters the constant voltage charging stage. During the constant voltage charging stage, continue to record the current and voltage data of the battery. It is necessary to ensure that the recording time interval is small enough to accurately reflect the change of current over time. As the battery is charged, the current will gradually decrease until it approaches the constant voltage voltage set by the charger. Continue recording until the current drops to a preset cutoff value, at which point the battery charging is nearly complete. Finally, the constant voltage charging current curve is plotted with time (usually seconds or minutes) as the horizontal axis and current (amperes) as the vertical axis.

[0048] 102. Determine the charging rate combination corresponding to the constant voltage charging current curve.

[0049] According to the rated capacity of the battery and the actual charging current, calculate the charging rate at different time points. The charging rate is defined as the ratio of the charging current to the rated capacity of the battery. On the constant voltage charging current curve, select several key coordinate points (or time points). These key coordinate points can be specific percentage drop points of the current, or inflection points where the current changes significantly. At each coordinate point, calculate the corresponding charging rate based on the charging current at that time and the rated capacity of the battery. Combine the charging rates of all coordinate points to form a sequence. This sequence can be an arithmetic progression, or it can be adjusted according to the actual charging characteristics.

[0050] 103. Fit the constant voltage charging current curve and the charging rate combination to obtain an equivalent step current curve corresponding to the constant voltage charging current curve.

[0051] From the constant voltage charging current curve, select key coordinate points as references for the charging rate. These coordinate points can be the peak point of the current, the descending inflection point, the charging cut-off point, etc. Based on the current values ​​of these coordinate points, determine an arithmetic progression of charging rate combinations. For each selected charging rate, observe the constant voltage charging current curve to determine the time period during which the current remains relatively stable at this rate. Combine the determined charging rate with the corresponding duration to construct an equivalent step current curve. Each charging rate corresponds to a step, the height of the step represents the charging rate, and the width of the step represents the duration. Arrange these steps in chronological order to form a step-like current curve. Different fitting methods can be selected, such as linear interpolation, polynomial fitting, spline interpolation, etc. The purpose of fitting is to find a mathematical model that can accurately describe the change of charging current over time and can simplify this continuous change into a step-like change.

[0052] Optionally, in some embodiments of the present application, the step of “fitting a constant-voltage charging current curve and a charging rate combination to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve” may specifically include:

[0053] Determine the time period during which the current of each charging rate in the charging rate combination remains relatively stable, and obtain the working time corresponding to the charging rate;

[0054] The constant-voltage charging current curve and the charging rate combination are fitted according to the constant-voltage charging current curve and the working time corresponding to the charging rate to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve.

[0055] Identify the various stages of current change, especially the stages when the current is relatively stable.

[0056] For each charging rate, calculate its corresponding working time. The working time refers to the length of time that the current remains relatively stable at the charging rate. For example, if the current remains stable from the 10th minute to the 15th minute at a certain charging rate, the working time of the charging rate is 5 minutes. List all charging rates and their corresponding working times to form a preliminary framework of a charging strategy. Using the above charging rate and working time data, fit the equivalent step current curve. In this process, each charging rate corresponds to a step on the equivalent step current curve, and the width of each step corresponds to the working time of the charging rate.

[0057] 104. According to the equivalent step current curve and the charging rate combination, a charging strategy corresponding to the lithium battery is constructed, and the lithium battery is charged based on the charging strategy.

[0058] The equivalent step current curve determines the charge rate and operating time corresponding to each step. These steps reflect the current size and duration used in different charging stages. Each charge rate and its corresponding operating time are extracted from the equivalent step current curve. Using the extracted charge rate and operating time, a detailed charging strategy is formulated. This charging strategy will guide the change of current during the charging process to simulate the effect of constant voltage charging. The charging strategy includes an initial constant current charging stage, followed by multiple alternating charge rates and operating times to form a charging strategy with mixed charging of different currents. Finally, the lithium battery is charged based on the charging strategy.

[0059] Optionally, in some embodiments of the present application, the step of “constructing a charging strategy corresponding to the lithium battery according to the equivalent step current curve and the charging rate combination, and charging the lithium battery based on the charging strategy” may specifically include:

[0060] Determine the charging rate corresponding to the equivalent step current curve and the working time corresponding to each charging rate in the charging rate combination, and determine the constant current rate corresponding to the constant voltage charging current curve;

[0061] Construct a charging strategy for lithium batteries based on the charging rate, the working time corresponding to each charging rate, and the constant current rate;

[0062] Charge the lithium battery based on real-time charging demand and charging strategy.

[0063] The constant current rate refers to the starting current rate used in the constant current charging stage, which is usually the first stage of the charging process until the battery voltage reaches the constant voltage charging threshold. Individual charging rates are identified from the equivalent step current curve, which are usually determined based on the key points of the constant voltage charging current curve.

[0064] For each charging rate, determine the corresponding working time, that is, the time period during which the current remains stable at this rate.

[0065] Assuming the rated capacity of the battery is 2Ah, the current in the constant current charging stage is set to 2A, which corresponds to a charging rate of 1C. Constant current charging stage: Charge at a rate of 1C (2A) until the battery voltage reaches the threshold for constant voltage charging (e.g. 4.2V). Switch to constant voltage charging mode and the voltage is set to 4.2V. Charge at a rate of 1C for 10 minutes; reduce the rate to 0.8C (1.6A) and charge for 15 minutes; reduce the rate to 0.6C (1.2A) and charge for 20 minutes; reduce the rate to 0.4C (0.8A) until the battery is fully charged. Use a battery management system (BMS) or other charging controller to charge lithium batteries according to the built-in charging strategy. During the charging process, the BMS monitors the voltage, current, and temperature of the battery to ensure that the charging process is carried out according to the established strategy and makes adjustments if necessary.

[0066] Optionally, in some embodiments of the present application, the step of “constructing a charging strategy corresponding to the lithium battery according to the charging rate, the working time corresponding to each charging rate, and the constant current rate” may specifically include:

[0067] Obtain the temperature rise curve of the lithium battery during constant voltage charging;

[0068] Determine the temperature rise inflection point corresponding to the temperature rise curve;

[0069] Based on the temperature rise inflection point, charging rate, working time corresponding to each charging rate and constant current rate, a charging strategy corresponding to the lithium battery is constructed.

[0070] During constant voltage charging, a temperature sensor is used to monitor the temperature of the lithium battery in real time. The battery temperature corresponding to each time point during the charging process is recorded to obtain a temperature rise curve. The temperature rise curve is analyzed to find the point where the temperature rise rate changes most significantly, which is the temperature rise inflection point. The temperature rise inflection point usually marks the beginning of heat accumulation during battery charging and is a key parameter that requires special attention in the charging strategy. Using a constant voltage charging current curve and a charge rate combination, the charge rate before, between, and after the temperature rise inflection point is determined. For each charge rate, its corresponding working time is determined, that is, the time period during which the current remains stable at this rate. For charging stages greater than the temperature rise inflection point rate, the charging time is reduced to prevent overheating. For charging stages less than the temperature rise inflection point rate, the working time can be appropriately extended to fully utilize the battery's charging capacity without causing overheating. Use the constant current mode in the early stage of charging, charging at a constant current rate until the battery voltage approaches the constant voltage charging threshold.

[0071] Optionally, in some embodiments of the present application, the step of “building a charging strategy corresponding to the lithium battery based on the temperature rise inflection point, the charging rate, the working time corresponding to each charging rate, and the constant current rate” may specifically include:

[0072] Determine the charging rate corresponding to the temperature rise inflection point as the temperature rise inflection point rate;

[0073] Reduce the operating time of the charging rate greater than the temperature rise inflection point rate to a preset value, and;

[0074] Adjust the working time of the charging rate less than the temperature rise inflection point rate according to the preset strategy;

[0075] According to the adjusted working time, temperature rise inflection point, charging rate and constant current rate, the corresponding charging strategy of the lithium battery is constructed.

[0076] Optionally, in some embodiments of the present application, it may also specifically include: when charging the lithium battery using the charging strategy, reducing the charging time or reducing the charging rate based on real-time charging demand.

[0077] For example, if the user needs to get as much power as possible in a short period of time, the charging time can be shortened, but at the same time it is necessary to ensure that the battery will not overheat or be damaged. Through BMS control, a higher charging rate can be used at the beginning of charging, and then the charging rate can be reduced when it is close to full to reduce the charging time. If the user does not have strict requirements on the charging time, or the battery temperature is close to the safety threshold, the charging rate can be reduced to reduce heat generation and extend battery life. During the charging process, if the battery temperature is detected to be high, the charging rate can be automatically reduced until the temperature falls back to a safe range.

[0078] In order to further understand the lithium battery charging scheme of the present application, the following will take a specific implementation scenario as an example to illustrate. First, the "equivalent step current curve" of the "constant voltage charging current curve" is fitted. The rate current combination of the step curve is an arithmetic progression (an = constant current charging rate, a1 = constant voltage charging cut-off rate, the tolerance can be determined according to demand, generally "1" is sufficient), and the duration of each step rate needs to be determined according to the "constant voltage charging current curve". By adjusting the duration, the "equivalent step current curve" is distributed on the "constant voltage charging current curve", such as Figure 2 ② After the "equivalent step current curve" is determined, each step charging rate combination (fitting rate + working time) is inserted into the constant current charging process, thereby forming multiple "large current (first current) + small current (second current)" charging combinations ("large current (first current)" is the original constant current charging rate, and "small current (second current)" is the rate in the "fitting current combination", as shown in the figure. Figure 3 As shown. ③ After the current combination is formed, the working time of the large current (first current) in the combination is determined. This time can be set as required. The following method can also be adopted. First, by testing the charging temperature rise curve of CCCV charging, the charging rate corresponding to the inflection point of the temperature rise curve is determined, which is called the "temperature rise inflection point rate". The working time of the large current (first current) combined with the "temperature rise inflection point rate" is consistent with the working time of the "temperature rise inflection point rate". The working time of the large current (first current) combined with a larger current than the "temperature rise inflection point rate" is half of the working time of the small current (second current); the remaining large current (first current) combined with a smaller current than the "temperature rise inflection point rate" is distributed in equal intervals, and finally the charging strategy is obtained. ④ When using the new charging strategy for charge and discharge cycles, it is necessary to control the capacity attenuation by reducing the charging time (reducing the later stage steps) or reducing the charging rate according to the use requirements. For example, the capacity retention rate is reduced by 1% every 50 cycles to achieve the effect of controlling the polarization voltage.

[0079] A lithium battery charging method provided in an embodiment of the present application, after obtaining the constant voltage charging current curve of the lithium battery during constant voltage charging, determines the charging rate combination corresponding to the constant voltage charging current curve, then fits the constant voltage charging current curve and the charging rate combination to obtain an equivalent step current curve corresponding to the constant voltage charging current curve, and finally, according to the equivalent step current curve and the charging rate combination, constructs a charging strategy corresponding to the lithium battery, and charges the lithium battery based on the charging strategy. The lithium battery charging scheme provided in the present application combines the constant voltage charging current curve and the charging rate of the lithium battery during constant voltage charging to form an equivalent step current curve, and uses the equivalent step current curve and the charging rate combination to construct a charging strategy corresponding to the lithium battery, so as to charge the battery. During the charging process, the temperature rise caused by the constant current and constant voltage charging method can be avoided, thereby improving the safety of lithium battery charging.

[0080] In addition, the present application also provides an electronic device, such as Figure 4 As shown, it shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:

[0081] The electronic device may include components such as a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, and an input unit 304. Those skilled in the art will appreciate that Figure 4 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0082] The processor 301 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

[0083] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and lithium battery charging by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0084] The electronic device also includes a power supply 303 for supplying power to each component. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so that the power management system can manage charging, discharging, power consumption and other functions. The power supply 303 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

[0085] The electronic device may further include an input unit 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0086] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302, thereby realizing various functions, as follows:

[0087] Obtain a constant-voltage charging current curve of a lithium battery during constant-voltage charging; determine a charging rate combination corresponding to the constant-voltage charging current curve; fit the constant-voltage charging current curve and the charging rate combination to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve; construct a charging strategy corresponding to the lithium battery according to the equivalent step current curve and the charging rate combination, and charge the lithium battery based on the charging strategy.

[0088] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0089] After obtaining the constant-voltage charging current curve of the lithium battery during constant-voltage charging, the embodiment of the present application determines the charging rate combination corresponding to the constant-voltage charging current curve, then fits the constant-voltage charging current curve and the charging rate combination to obtain the equivalent step current curve corresponding to the constant-voltage charging current curve, and finally, according to the equivalent step current curve and the charging rate combination, constructs a charging strategy corresponding to the lithium battery, and charges the lithium battery based on the charging strategy. The lithium battery charging scheme provided by the present application combines the constant-voltage charging current curve and the charging rate of the lithium battery during constant-voltage charging to form an equivalent step current curve, and uses the equivalent step current curve and the charging rate combination to construct a charging strategy corresponding to the lithium battery, so as to charge the battery. During the charging process, the temperature rise caused by the constant current and constant voltage charging method can be avoided, thereby improving the safety of lithium battery charging.

[0090] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0091] To this end, an embodiment of the present application provides a storage medium in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps in any one of the lithium battery charging methods provided in the embodiments of the present application. For example, the instructions can execute the following steps:

[0092] Obtain a constant-voltage charging current curve of a lithium battery during constant-voltage charging; determine a charging rate combination corresponding to the constant-voltage charging current curve; fit the constant-voltage charging current curve and the charging rate combination to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve; construct a charging strategy corresponding to the lithium battery according to the equivalent step current curve and the charging rate combination, and charge the lithium battery based on the charging strategy.

[0093] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0094] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0095] Since the instructions stored in the storage medium can execute the steps in any one of the lithium battery charging methods provided in the embodiments of the present application, the beneficial effects that can be achieved by any one of the lithium battery charging methods provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0096] The above is a detailed introduction to a lithium battery charging method, an electronic device, and a storage medium provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A lithium battery charging method, characterized in that: include: Obtain the constant voltage charging current curve of the lithium battery during constant voltage charging; Determine a charging rate combination corresponding to the constant voltage charging current curve; Fitting the constant voltage charging current curve with the charging rate combination to obtain an equivalent step current curve corresponding to the constant voltage charging current curve; According to the equivalent step current curve and the charging rate combination, a charging strategy corresponding to the lithium battery is constructed, and the lithium battery is charged based on the charging strategy.

2. The lithium battery charging method according to claim 1, characterized in that: The step of constructing a charging strategy corresponding to the lithium battery according to the equivalent step current curve and the charging rate combination, and charging the lithium battery based on the charging strategy, includes: Determining the charging rate corresponding to the equivalent step current curve and the working time corresponding to each charging rate in the charging rate combination, and determining the constant current rate corresponding to the constant voltage charging current curve; Constructing a charging strategy corresponding to the lithium battery according to the charging rate, the working time corresponding to each charging rate, and the constant current rate; The lithium battery is charged based on the real-time charging demand and the charging strategy.

3. The lithium battery charging method according to claim 2, characterized in that: The charging strategy corresponding to the lithium battery is constructed according to the charging rate, the working time corresponding to each charging rate, and the constant current rate, including: Obtain the temperature rise curve of the lithium battery during constant voltage charging; Determine the temperature rise inflection point corresponding to the temperature rise curve; Based on the temperature rise inflection point, the charging rate, the working time corresponding to each charging rate, and the constant current rate, a charging strategy corresponding to the lithium battery is constructed.

4. The lithium battery charging method according to claim 3, characterized in that: The charging strategy corresponding to the lithium battery is constructed based on the temperature rise inflection point, the charging rate, the working time corresponding to each charging rate, and the constant current rate, including: Determine the charging rate corresponding to the temperature rise inflection point as the temperature rise inflection point rate; reducing the operating time of the charging rate greater than the temperature rise inflection point rate to a preset value, and; Adjusting the working time of the charging rate less than the temperature rise inflection point rate according to a preset strategy; A charging strategy corresponding to the lithium battery is constructed according to the adjusted working time, the temperature rise inflection point, the charging rate and the constant current rate.

5. The lithium battery charging method according to claim 2, characterized in that: The charging of the lithium battery based on the real-time charging demand and the charging strategy includes: When the lithium battery is charged using the charging strategy, the charging time is reduced or the charging rate is reduced based on real-time charging requirements.

6. The lithium battery charging method according to any one of claims 1 to 5, characterized in that: The step of determining the charging rate combination corresponding to the constant voltage charging current curve comprises: Determining the charging current value corresponding to each time point in the constant voltage charging current curve; Determine a data point in the constant voltage charging current curve that meets a preset condition; Based on the charging current value corresponding to each time point and the data point, a charging rate combination corresponding to the constant voltage charging current curve is determined.

7. The lithium battery charging method according to any one of claims 1 to 5, characterized in that: The fitting of the constant-voltage charging current curve and the charging rate combination to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve includes: Determine the time period in which the current of each charging rate in the charging rate combination remains relatively stable, and obtain the working time corresponding to the charging rate; The constant-voltage charging current curve and the charging rate combination are fitted according to the constant-voltage charging current curve and the working time corresponding to the charging rate to obtain an equivalent step current curve corresponding to the constant-voltage charging current curve.

8. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the lithium battery charging method as described in any one of claims 1 to 7 are implemented.

9. A computer-readable storage medium, characterized in that: A computer program is stored thereon, wherein when the computer program is executed by a processor, the steps of the lithium battery charging method as described in any one of claims 1 to 7 are implemented.

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